Open Rates: The percentage of recipients who open your email. Click-Through Rates (CTR): The percentage of recipients who click on a link within your email. Conversion Rates: The percentage of recipients who complete the desired action, such as making a purchase or registering for an event. Unsubscribe Rates: The percentage of recipients who unsubscribe from your mailing list after receiving the email. Engagement Metrics: Metrics such as time spent reading the email, replies, and social shares.